Overview
The SG3524DR, produced by Texas Instruments, is a highly integrated pulse-width modulation (PWM) power-control circuit. This device incorporates all the necessary functions for constructing regulating power supplies, inverters, or switching regulators on a single chip. It is designed for switching regulators of either polarity, transformer-coupled DC/DC converters, transformerless voltage doublers, and polarity-converter applications using fixed-frequency PWM techniques. The SG3524DR is also suitable as the control element for high-power-output applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 16 | - |
| Operating Temperature Range | 0 to 70 | °C |
| Supply Voltage (VCC/VDD) | 8 to 40 | V |
| Switching Frequency | Up to 450 KHz | - |
| Standby Current | 8 mA (Typical) | - |
| Total Power Dissipation at Tamb = 70°C | 1000 mW | - |
| Thermal Resistance Junction-ambient | 80 °C/W | - |
| Output Configuration | Positive, Isolation Capable | - |
| Output Type | Transistor Driver | - |
Key Features
- Complete Pulse-Width Modulation (PWM) power-control circuitry
- Uncommitted outputs for single-ended or push-pull applications
- Low standby current of 8 mA (Typical)
- Programmable oscillator with a frequency range from 120 Hz to 500 KHz
- On-chip 5V regulator serving as a reference and powering internal control circuitry
- Error amplifier, pulse-steering flip-flop, two uncommitted pass transistors, high-gain comparator, and current-limiting and shutdown circuitry
Applications
- Switching regulators of any polarity
- Transformer-coupled DC/DC converters
- Transformerless voltage doublers
- Polarity-converter applications
- Buck, boost, flyback, forward converter, full-bridge, half-bridge, and push-pull regulators
- Step-up, step-down, and step-up/step-down DC-DC converters
Q & A
- What is the SG3524DR used for? The SG3524DR is used for constructing regulating power supplies, inverters, or switching regulators, and as the control element for high-power-output applications.
- What is the operating temperature range of the SG3524DR? The operating temperature range is from 0°C to 70°C.
- What is the supply voltage range for the SG3524DR? The supply voltage range is from 8V to 40V.
- What is the maximum switching frequency of the SG3524DR? The maximum switching frequency is up to 450 KHz.
- What type of outputs does the SG3524DR have? The SG3524DR has uncommitted outputs for single-ended or push-pull applications.
- Does the SG3524DR have an on-chip regulator? Yes, it includes an on-chip 5V regulator that serves as a reference and powers the internal control circuitry.
- What is the typical standby current of the SG3524DR? The typical standby current is 8 mA.
- What types of DC/DC converters can the SG3524DR be used for? It can be used for buck, boost, flyback, forward converter, full-bridge, half-bridge, and push-pull regulators.
- How is the oscillator frequency programmed in the SG3524DR? The oscillator frequency is programmed using one timing resistor (RT) and one timing capacitor (CT).
- What is the thermal resistance junction-ambient of the SG3524DR? The thermal resistance junction-ambient is 80 °C/W.
